Description of problem:
Some tests failed in ppc64le because ppc64le arch is not guessed

Version-Release number of selected component (if applicable):
hdf5-1.8.12-5

How reproducible:
run rpmbuild with check enabled on ppc64le

Additional info:
need to patch bin/config.gues
--- hdf5-1.8.12/bin/config.guess.ori    
+++ hdf5-1.8.12/bin/config.guess        
@@ -921,6 +921,9 @@ EOF
     ppc64:Linux:*:*)
        echo powerpc64-unknown-linux-gnu
        exit ;;
+    ppc64le:Linux:*:*)
+       echo powerpc64le-unknown-linux-gnu
+       exit ;;
     alpha:Linux:*:*)
        case `sed -n '/^cpu model/s/^.*: \(.*\)/\1/p' < /proc/cpuinfo` in
          EV5)   UNAME_MACHINE=alphaev5 ;;

Be carreful, this patch cannot be applied as is. bin/config.guess is prviously patched in the spec file by hdf5-aarch64.patch.